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Expanding NPP Risk Assessment To Multi-Unit Context: Achievements And Challenges

Date and time

Monday, 27 July 2020
16:00-17:15 UTC (Vienna, Austria)

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Presentations →


This webinar presents results of recent IAEA project on Multi-unit (MU) Probabilistic Safety Assessment implemented by IAEA Division of Nuclear Installation Safety. The speakers will discuss the challenges and benefits of multi-unit risk assessment including risk-informed decision making and risk management in a multi-unit context. 

The panel discussions will also address the sustainable effort for enhancing nuclear safety addressing multi-unit interactions for multi-unit sites (including building new NPPs on existing sites and utilization of different technologies such as Small Modular Reactors). 

The webinar topics are: 

  • Risk assessment in MU context: IAEA NSNI project on Multi-unit Probabilistic Safety Assessment (MUPSA)
  • Risk-informed decision making and safety improvement in MU context
  • MUPSA International Perspective: Achievements and Trends
  • Challenges and benefits of MU risk assessment


George Apostolakis, USA
Mr Apostolakis is the Head of the Nuclear Risk Research Centre in Japan. He is a professor emeritus at the Massachusetts Institute of Technology. He served as a Commissioner of the U.S. Nuclear Regulatory Commission from 23 April 2010 until 30 June 2014. 

Marina Röwekamp, Germany
Ms Röwekamp is Senior Chief Expert for Probabilistic Safety Assessment and Hazards at GRS the Federal German Nuclear Technical Support Organization. Since 2014 she is the Chair of OECD/NEA/CSNI Working Group on Risk Assessment (WGRISK).

Karl Fleming, USA
Mr Fleming is the President of KNF Consulting and Member of the USA National Academy of Engineering. He is the lead contributor of the IAEA Safety Report Series No96 Technical Approach for Multiunit PSA.


Ovidiu Coman, IAEA
Shahen Poghosyan, IAEA

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